7-pin EF Johnson Number 122-227-200 Ceramic Chassis mount socket NOS 1940's - 1950's (8 in stock) (1625 power tube)7 pin EF Johnson Number 122 227 200 Ceramic Chassis mount NOS (JOHNSON 227) stamped on bottom of socket hard to see different production batches, bottom of sockets stamped different (2) phosphor bronze contacts silver plated (6) bronze contacts, not sure if silver plated have pins tarnished (or pins are tarnished nickel plated) (for 1625 power tube)